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SAE NTSB Vehicle Recorder TOPTEC Symposium Panel 2 Aviation. 4 June 2003. Accident Recorder Survivability / Crashworthiness Requirements. Recorder Independent Power Supply (RIPS) TOPICS Why a RIPS? NTSB Safety Recommendations A99-16 and 17 Why connect the CVR to the RIPS?

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Accident Recorder Survivability / Crashworthiness Requirements

Recorder Independent Power Supply (RIPS)

TOPICS

  • Why a RIPS?

  • NTSB Safety Recommendations A99-16 and 17

  • Why connect the CVR to the RIPS?

  • Additional RIPS Information

Vehicle Recorder TOPTEC Symposium 2003


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Accident Recorder Survivability / Crashworthiness Requirements

Aviation accident and incident investigations have been hindered by a loss of data acquisition due to recorder power interruptions.

Not a survivability requirement - the RIPS provides continued recording of audio (data) into the survivable recorder during power interruptions.

Today’s aviation recorders are very crash survivable!

Additional gains through uninterrupted recordings.

Vehicle Recorder TOPTEC Symposium 2003


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Why a RIPS? Requirements

Aircraft electrical power to recorders gets interrupted during incidents for various reasons:

  • Loss of engines - resultant loss of power generation - this could be due to engine separation, lightning, bird ingestion, FOD, error

  • Loss of the power and signal lines - between sources and the recorder due to mechanical, explosive or fire effects

Vehicle Recorder TOPTEC Symposium 2003


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Why a RIPS? Requirements

What’s Needed: RIPS provides backup power independent of the aircraft generated power busses

  • Uninterrupted data collection due to power failures

  • Maintain data collection during a very critical period

  • Reduce missing data challenges during Investigation

Vehicle Recorder TOPTEC Symposium 2003


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Why a RIPS? Requirements

Accidents involving Recorder power interruptions

  • ValuJet 592 DC-9 No CVR or FDR data 40-50 seconds

  • TWA 800 747 No CVR or FDR data 40-50 seconds

  • SilkAir 185 737 No CVR or FDR data during 35K’ rapid descent

  • Swissair 111 MD-11 No CVR or FDR data for 6 minutes

  • Overseas National Airways 032 DC-10 JFK, NY 1975

  • Southern Airways 242 DC-9 New Hope, Georgia 1977

  • American Airlines 191 DC-10 Chicago, IL 1979

  • United Airlines 811 747 Honolulu, HI 1989

Vehicle Recorder TOPTEC Symposium 2003


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NTSB Safety Recommendation A99-16 Requirements

Retrofit after 1 January 2005, all CVR’s on all airplanes required to carry both a CVR and an FDR with a CVR that meets:

  • TSO C-123a

  • is capable of recording the last 2 hours of audio

  • is fitted with an independent power source that is located with the digital CVR and that automatically engages and provides 10 minutes of operation whenever aircraft power to the recorder ceases, either by normal shutdown or by a loss of power to the bus.

Vehicle Recorder TOPTEC Symposium 2003


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NTSB Safety Recommendation A99-17 Requirements

Aircraft manufactured after 1 January 2003, that must carry both a CVR and DFDR be equipped with two combined recorder systems (CVR/DFDR)

  • One as near the cockpit as practicable the other as far aft as practicable

  • Both capable of recording all mandatory data parameters for 25 hours

  • Both capable of recording all cockpit audio and CPDL messages for the last 2 hours

  • Cockpit system provided with a RIPS

Vehicle Recorder TOPTEC Symposium 2003


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Why connect the CVR to a RIPS? Requirements

RIPS to power the CVR or Combi - not the FDR

  • CVR is a self contained lower power (10W) system

  • CVR provides power to the Cockpit Area Microphone

  • CVR collects flight deck aural environment and flight crew communications

  • FDR requires support of multiple sensors and a FDAU, relies on the availability of other systems for data parameter information, and has increased and differing power requirements over CVR

Vehicle Recorder TOPTEC Symposium 2003


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RIPS Implementation Requirements

  • Install as close as possible to the recorder

  • 2 hour recorders (Class I)

  • Holdup for 10 minutes - prevent overwrite of data

  • Operates on 115 VAC 400Hz or +28VDC

  • Provides +28VDC to CVR or Combi

  • RIPS designed for frequent power cycles

  • Recharge time 15 minutes

  • <50 ms after loss of A/C power

Vehicle Recorder TOPTEC Symposium 2003


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RIPS Specifications Requirements

  • ARINC Characteristic 777 Recorder Independent Power Supply

  • EUROCAE ED-112 MOPS FOR CRASH PROTECTED AIRBORNE RECORDER SYSTEMS- Section 5

  • FAA Draft TSO dated 6/07/02 for RIPS

Vehicle Recorder TOPTEC Symposium 2003


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RIPS Installations Requirements

ARINC 777 Stand alone

Integrated CVR Tray

Vehicle Recorder TOPTEC Symposium 2003


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Summary and Conclusions Requirements

  • Various causes for power loss

  • RIPS provides Recorder power during very critical period for continued data collection

  • 10 minutes holdup

  • RIPS will be TSO’d

  • Stand alone or CVR tray integrated design

Vehicle Recorder TOPTEC Symposium 2003


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Accident Recorder Survivability / Crashworthiness Requirements

Thank You

SAE/NTSB TOPTEC

Jim Elliott

Smiths Aerospace

+1 616 241 7789

[email protected]

Vehicle Recorder TOPTEC Symposium 2003


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